Earning Money Via Forex - is it beneficial?

It happened so that one of my clients started to earn good money online via Forex.
He chose http://alpari.com/ and recommended me to try them. It is Forex broker.
I would like to know more about this way of getting money online. What should I know before the start?
What other Forex brokers do you know?

No doubt, One of my friends also face the lose in forex trading. There are always uncertainty in this field.

Commercial Contractor Madison has 20+ years of experience in commercial construction and assist clients in finding the ideal space for their business along with helping them design and build their new development.